syzkaller login: [ 31.600951] BUG: Bad rss-counter state mm:000000002b6c896c type:MM_FILEPAGES val:33 [ 31.602029] BUG: Bad rss-counter state mm:000000002b6c896c type:MM_ANONPAGES val:22 [ 31.788513] ================================================================== [ 31.789523] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.790603] Read of size 8 at addr ffff888016aff3f8 by task sshd/220 [ 31.791618] [ 31.791863] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.792836] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.793957] Call Trace: [ 31.794345] [ 31.794678] dump_stack_lvl+0x91/0xf0 [ 31.795217] print_report+0xcc/0x620 [ 31.795784] ? __virt_addr_valid+0x102/0x340 [ 31.796408] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.797118] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.797834] kasan_report+0xbe/0xf0 [ 31.798409] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.799169] vma_interval_tree_remove+0xc75/0xec0 [ 31.799890] vma_prepare+0xc54/0x11a0 [ 31.800398] __split_vma+0x5af/0x950 [ 31.800905] ? __pfx___split_vma+0x10/0x10 [ 31.801465] ? find_held_lock+0x2c/0x110 [ 31.802034] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.802662] ? lock_is_held_type+0x9f/0x120 [ 31.803230] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.803891] ? mtree_range_walk+0x632/0x900 [ 31.804463] ? mas_walk+0x5c7/0x7c0 [ 31.804972] do_vmi_munmap+0x1f1/0x2b0 [ 31.805496] mmap_region+0x1f9/0x2660 [ 31.806028] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.806604] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.807355] ? __pfx_lock_acquire+0x10/0x10 [ 31.807936] ? __pfx_mmap_region+0x10/0x10 [ 31.808507] ? security_mmap_addr+0x7d/0xa0 [ 31.809070] ? get_unmapped_area+0x1f5/0x3f0 [ 31.809670] do_mmap+0x854/0xf00 [ 31.810143] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.810683] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.811269] ksys_mmap_pgoff+0x3af/0x500 [ 31.811819] do_syscall_64+0x3f/0x90 [ 31.812320] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.813010] RIP: 0033:0x7f4264438d82 [ 31.813506] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.815820] RSP: 002b:00007ffdacd7aa18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.816788] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4264438d82 [ 31.817703] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4263872000 [ 31.818624] RBP: 00007f4263872000 R08: 0000000000000009 R09: 0000000000001000 [ 31.819528] R10: 0000000000000812 R11: 0000000000000206 R12: 00005567b8c6cf70 [ 31.820414] R13: 00007ffdacd7aa30 R14: 00007ffdacd7aa60 R15: 00007ffdacd7adc0 [ 31.821328] [ 31.821665] [ 31.821888] Allocated by task 213: [ 31.822351] kasan_save_stack+0x22/0x50 [ 31.822900] kasan_set_track+0x25/0x30 [ 31.823420] __kasan_slab_alloc+0x59/0x70 [ 31.823978] kmem_cache_alloc+0x16b/0x370 [ 31.824529] vm_area_dup+0x20/0x160 [ 31.825007] __split_vma+0x170/0x950 [ 31.825511] split_vma+0xc6/0x110 [ 31.825991] mprotect_fixup+0x8d2/0xb30 [ 31.826551] do_mprotect_pkey+0x87e/0xd40 [ 31.827104] __x64_sys_mprotect+0x78/0xc0 [ 31.827666] do_syscall_64+0x3f/0x90 [ 31.828158] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.828844] [ 31.829067] Freed by task 203: [ 31.829482] kasan_save_stack+0x22/0x50 [ 31.830033] kasan_set_track+0x25/0x30 [ 31.830580] kasan_save_free_info+0x2b/0x50 [ 31.831154] __kasan_slab_free+0x10a/0x190 [ 31.831730] kmem_cache_free+0x10d/0x4d0 [ 31.832265] rcu_core+0x8c8/0x2860 [ 31.832742] __do_softirq+0x1b7/0x7d4 [ 31.833250] [ 31.833477] Last potentially related work creation: [ 31.834139] kasan_save_stack+0x22/0x50 [ 31.834689] __kasan_record_aux_stack+0x8e/0xa0 [ 31.835287] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.835993] remove_vma+0x139/0x170 [ 31.836474] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.837066] do_vmi_munmap+0x1f1/0x2b0 [ 31.837600] __vm_munmap+0x138/0x3a0 [ 31.838091] __x64_sys_munmap+0x59/0x80 [ 31.838643] do_syscall_64+0x3f/0x90 [ 31.839133] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.839825] [ 31.840047] The buggy address belongs to the object at ffff888016aff3a0 [ 31.840047] which belongs to the cache vm_area_struct of size 168 [ 31.841650] The buggy address is located 88 bytes inside of [ 31.841650] freed 168-byte region [ffff888016aff3a0, ffff888016aff448) [ 31.843170] [ 31.843399] The buggy address belongs to the physical page: [ 31.844114] page:000000002fe764be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16aff [ 31.845281] memcg:ffff88800c70ed01 [ 31.845756] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.846460] page_type: 0xffffffff() [ 31.846948] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.847933] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c70ed01 [ 31.848898] page dumped because: kasan: bad access detected [ 31.849624] [ 31.849856] Memory state around the buggy address: [ 31.850485] ffff888016aff280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.851407] ffff888016aff300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.852327] >ffff888016aff380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.853245] ^ [ 31.854181] ffff888016aff400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.855087] ffff888016aff480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.856013] ================================================================== [ 31.858543] Disabling lock debugging due to kernel taint [ 33.626745] BUG: Bad rss-counter state mm:000000003d618c61 type:MM_FILEPAGES val:33 [ 33.627509] BUG: Bad rss-counter state mm:000000003d618c61 type:MM_ANONPAGES val:22 [ 34.068522] BUG: Bad rss-counter state mm:00000000307ccce5 type:MM_FILEPAGES val:33 [ 34.069741] BUG: Bad rss-counter state mm:00000000307ccce5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17537' (ECDSA) to the list of known hosts. 2023/06/19 18:27:39 fuzzer started 2023/06/19 18:27:39 dialing manager at localhost:44161 2023/06/19 18:27:39 checking machine... 2023/06/19 18:27:39 checking revisions... [ 34.743541] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:27:39 testing simple program... [ 34.800276] cgroup: Unknown subsys name 'net' [ 34.853244] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:27:38 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888010392000 RCX=0000000000000000 RDX=1ffffd40000c51b7 RSI=0000000000000008 RDI=ffffea0000628d80 RBP=0000000000000014 RSP=ffff8880147f7990 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6c88 R12=0000000000000001 R13=ffff88807ffdc000 R14=ffffea0000628d80 R15=ffffea0000628d80 RIP=ffffffff8180fd24 RFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1c609ac900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f1c5fe211b0 CR3=00000000145b2000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=7800499b7ff9561900000000000ae988 XMM05=ca9c8c646b889d6f00000000001351b8 XMM06=19e9129bd510f2350000000000134300 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000000000000000a RCX=ffffffff81f58634 RDX=ffff8880159f51c0 RSI=0000000000000000 RDI=0000000000000003 RBP=ffffffff849c8b80 RSP=ffff888016f97a58 R8 =0000000000000003 R9 =0000000000000038 R10=000000000000001f R11=0000000000000000 R12=000000000000001f R13=0000000000000003 R14=000000000000000e R15=dffffc0000000000 RIP=ffffffff814c01fc RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa17c4d6900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fa17ca8d618 CR3=000000000e952000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000